President Trump’s decision to federalize and deploy Marines and the National Guard to help arrest illegal immigrants in Los Angeles violated the Posse Comitatus Act, a federal judge ruled Tuesday. Here’s what you need to know about the court ruling on military deployment for domestic law enforcement:

The federal court ruling

Judge finds Trump administration violated 1878 law restricting military use:

The constitutional violation findings

Court determines administration knowingly exceeded authority:

The original deployment circumstances

Trump sent troops after anti-ICE protests in Los Angeles:

The troop duties and withdrawal

Military provided security but performed law enforcement functions:

The law enforcement activity analysis

Judge found troops performed prohibited duties:

The emergency justification rejection

Court found no proper cause for military deployment:

The broader immigration enforcement issues

Another judge ruled ICE operations illegal for different reasons:

The California restriction order

New ruling limits troop use statewide:

The Democratic response

Governor Newsom celebrates constitutional victory:

Read more:

• Judge rules Trump violated Posse Comitatus Act by sending National Guard to Los Angeles

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The Washington Times AI Ethics Newsroom Committee can be reached at aispotlight@washingtontimes.com.